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Tech: The 944 / 951 Ignition System.

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Old 02-11-2013, 01:52 PM
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Originally Posted by refresh951
I will be interested in Joshua's comments. Seems like spark duration is the issue with a CDI setup. I think the spark would be brighter but have less duration. Seems CDI does have advantages in certain situations such as high oil content or very lean environments but that running an inductive setup should be better for our cars.
Yep, exactly. There are a few "tricks" that are misleading in some of the display set ups. For example, if you open up the gap, the spark will appear much brighter than a tight gap.

Amperage is what actually ignites the air/fuel; voltage is just needed too jump the gap...
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Old 02-11-2013, 02:11 PM
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Great thread, thanks.

I will be interested in your calculations for the D585 coils in a CDI application as I have been unable to find all their relevant specs.
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Old 02-11-2013, 02:23 PM
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Originally Posted by Thom
Great thread, thanks.

I will be interested in your calculations for the D585 coils in a CDI application as I have been unable to find all their relevant specs.
I have both the D585 and Ign-1A coils coming in to test. For those who don't aren't familiar with these coils, they are supposed to be one of the best coils for the LS-series GM V8 engines.
Additionally, I will see if I can get an MSD box hooked up to show its operation on the scope.
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Old 02-11-2013, 03:54 PM
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@joshua: i found this, is it the same that you tested?
http://www.ebay.it/itm/181038327618?...84.m1438.l2649
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Old 02-11-2013, 04:03 PM
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Originally Posted by joker2cv
@joshua: i found this, is it the same that you tested?
http://www.ebay.it/itm/181038327618?...84.m1438.l2649
That is close... The version I tested was the MSD Blaster high vibration, part number 8222.
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Old 02-11-2013, 09:39 PM
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Look what showed up today from Summit!

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Old 02-11-2013, 09:45 PM
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Originally Posted by lart951
question how do I change the ignition dwell map to account for the HVC II col?
That simple Lart - just change the gap on the points......
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Old 02-11-2013, 09:53 PM
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Originally Posted by refresh951
Look what showed up today from Summit!

Looks good!

Originally Posted by Chris White
That simple Lart - just change the gap on the points......
Lol
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Old 02-11-2013, 10:01 PM
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Originally Posted by refresh951
Look what showed up today from Summit!

What happens when your windshield gets dirty?
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Old 02-11-2013, 10:05 PM
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Originally Posted by m73m95
What happens when your windshield gets dirty?
Some conveniences must be sacrificed...
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Old 02-11-2013, 10:23 PM
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Originally Posted by refresh951
Look what showed up today from Summit!

If you call tomorrow, Magnecor can have a coil wire to your house by the weekend with the right connectors on both ends, and in any length you need.
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Old 02-11-2013, 10:34 PM
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[quote=Tom M'Guinn;10216427]
Originally Posted by refresh951

If you call tomorrow, Magnecor can have a coil wire to your house by the weekend with the right connectors on both ends, and in any length you need.
After reading all of this not sure if they are necessary, but I have Magnecors on four of my cars and very happy with fit, finish, quality, and longevity. Not to mention a reasonable price.
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Old 02-11-2013, 10:36 PM
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Originally Posted by Tom M'Guinn
If you call tomorrow, Magnecor can have a coil wire to your house by the weekend with the right connectors on both ends, and in any length you need.
Originally Posted by URG8RB8

After reading all of this not sure if they are necessary, but I have Magnecors on four of my cars and very happy with fit, finish, quality, and longevity. Not to mention a reasonable price.
Tom is more referring to the fact that the HVC-II coil has a standard GM HEI-style plug. The stock coil -> distributor wire will not work without changing the coil end.
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Old 02-11-2013, 10:51 PM
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Originally Posted by Rogue_Ant
Tom is more referring to the fact that the HVC-II coil has a standard GM HEI-style plug. The stock coil -> distributor wire will not work without changing the coil end.
The HVC-II comes with the coil end boot and connector so you can modify your exiting coil wire if it is long enough.
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Old 02-11-2013, 11:51 PM
  #75  
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Originally Posted by refresh951
The HVC-II comes with the coil end boot and connector so you can modify your exiting coil wire if it is long enough.
Good luck with that. I'm not a huge fan of Magnecor, but the MSD system calls for spiral core wires like that. They are lickity-split making custom wires though.

Originally Posted by Chris White
That simple Lart - just change the gap on the points......
I still have my old analog dwell angle meter if helpful, complete with sweeping needle like guages used to have. Wait, does that make me old?
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